--bg: #ffffff;
  --muted: #f3f4f6;
  --card: #ffffff;
  --text: #0f172a;
  --accent: #0ea5e9;
  --button: #6b7280;
  --glass: rgba(15, 23, 42, 0.04);
  --radius: 10px;
  --shadow: 0 6px 20px rgba(2, 6, 23, 0.08);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial;
}

* {
  font-size: 15px;
  box-sizing: border-box;
}

/* =========================================
   2️⃣  TOPBAR (THANH TRÊN CÙNG)
========================================= */
.main-content {
  width: 100%;
  margin: 0 auto;
}

.main-content .topbar {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: gray;
  z-index: 10;
}

.topbar .container {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 100px;
  gap: 20px;
  position: relative;
}

.topbar .logo {
  font-weight: 600;
  color: white;
}

.topbar .searchbar {
  width: 60%;
  text-align: center;
}

.searchbar input {
  width: 100%;
  padding: 8px 12px;
  border-radius: 4px;
  border: 1px solid #ccc;
  font-size: 1rem;
  transition: 0.2s ease-in-out;
}

.searchbar .img-search {
  width: 36px;
  height: 36px;
  display: none;
  cursor: pointer;
}

.searchbar .img-search img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.container .actions {
  display: flex;
  gap: 15px;
}

.actions .btn {
  border-radius: 10px;
  background-color: aqua;
  border: none;
  cursor: pointer;
  padding: 8px 12px;
}

.actions #generalBtn {
  display: none;
}

.actions .avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: blue;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: white;
  cursor: pointer;
  display: none;
}

.logo-searchIcon {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: nowrap;
  flex: 1; /* 👈 Cho phép chiếm hết không gian có thể */
  min-width: 0; /* 👈 Quan trọng: cho phép co nhỏ hơn nội dung */
}

.logo-searchIcon .logo {
  /* width: 100%; */
  font-size: 1rem;
}

.logo-searchIcon .searchbar {
  flex: 1;
}
/* =============GIAO DIỆN 768
px TRỞ XUỐNG ============ */
/* .container-768 {
  align-items: center;
  justify-content: space-between;
  padding: 12px 100px;
  gap: 10px;
  display: none;
} */

/* =========================================
   3️⃣  LAYOUT (SIDEBAR + NỘI DUNG CHÍNH)
========================================= */
.layout {
  min-height: 350px;
  display: flex;
  gap: 20px;
  padding: 20px 200px;
  background-color: #dbdfe6;
}

/* SIDEBAR */
.sidebar {
  max-width: 220px;
  background: var(--card);
  padding: 16px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  height: fit-content;
}

#categories {
  margin: 0;
  padding: 0;
}

.sidebar h3 {
  margin-top: 0;
}

.cat {
  list-style: none;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 6px;
}

.cat:hover {
  background: #f8fafc;
}

.cat.active {
  background: linear-gradient(90deg, #f8fafc, #ffffff);
  font-weight: 600;
}

/* CONTENTS */
.contents {
  flex: 1;
}

/* =========================================
   4️⃣  PANEL & POST
========================================= */
.panel {
  background-color: var(--card);
  padding: 16px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel h2 {
  margin-top: 0;
  font-size: 20px;
  font-weight: 600;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* --- DANH SÁCH BÀI VIẾT CỦA TÔI--- */
.panel #profileSection {
  display: none;
  text-align: center;
  margin-bottom: 20px;
}

#profileSection .c-avatar {
  width: 80px;
  height: 80px;
  font-size: 30px;
  margin: 0 auto;
  background: #2563eb;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

/* --- BÀI VIẾT --- */
.post {
  border-radius: 8px;
  border: 1px solid #d1d5db;
  background: linear-gradient(180deg, #fff, #fcfeff);
  cursor: pointer;
  padding: 12px;
  overflow: hidden;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* TOP CONTENT (bên trái: avatar + title) */
/* .top-content {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;

  gap: 12px;
} */

/* .left {
  flex: 1 1 auto;
  max-width: 78%;
} */

.avt-name-title {
  width: 500px;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.c-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.meta {
  font-size: 13px;
  color: var(--button);
}

/* --- TIÊU ĐỀ BÀI VIẾT (title trong left) --- */
.left .title {
  font-weight: 600;
  margin-top: 6px;
  white-space: normal;
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-word;
  overflow: hidden;
  line-height: 1.4;
}

/* --- NỘI DUNG BÀI VIẾT --- */
.post-content {
  white-space: normal;
  word-wrap: break-word;
  overflow-wrap: break-word;
  padding: 8px 0;
  line-height: 1.6;
  font-size: 15px;
  color: var(--text);
}

.PostImg {
  width: 100%;
}

.post-image {
  width: 100%;
  border-radius: 10px;
  margin-top: 10px;
  object-fit: cover;
}

/* =========================================
   5️⃣  ICON ACTIONS (TIM, COMMENT,...)
========================================= */
.icons-action {
  display: flex;
  gap: 16px;
  margin-top: 8px;
}

.icon-card {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: #f3f4f6;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
}

.icon-card p {
  margin: 0;
}

/* =========================================
   6️⃣  MODAL (CHI TIẾT BÀI VIẾT + ĐĂNG BÀI)
========================================= */
.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(2, 6, 23, 0.4);
  z-index: 30;
}

.modal[aria-hidden="false"] {
  display: flex;
}

.modal-dialog {
  background: var(--card);
  padding: 16px;
  border-radius: 12px;
  width: 100%;
  max-height: 80vh;
  max-width: 760px;
  box-shadow: var(--shadow);
  position: relative;
}

.modal-close {
  position: absolute;
  right: 12px;
  top: 10px;
  border: 0;
  background: transparent;
  font-size: 18px;
  cursor: pointer;
}

.content-scroll {
  max-height: 60vh;
  overflow: scroll;
}

/* ẨN THANH CUỘN */

.content-scroll::-webkit-scrollbar {
  display: none;
}
.content-scroll {
  scrollbar-width: none;
}

/* MODAL: BÌNH LUẬN */
.comments {
  margin-top: 8px;
  border-top: 1px solid #eef2f7;
  padding-top: 8px;
}

.comment {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px dashed #f1f5f9;
}

.comment .c-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.comment .c-body {
  flex: 1;
}

.comment .c-meta {
  font-size: 13px;
  color: #6b7280;
}

.comment-form {
  display: flex;
  flex-direction: column;
  align-items: end;
  padding: 12px;
  background-color: gray;
  border-radius: var(--border-box--);
}

.comment-form input {
  width: 100%;
  padding: 10px;
  background-color: transparent;
  outline: none;
  border: none;
  margin-bottom: 8px;
  color: var(--text);
}

#sendComment {
  width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- FORM ĐĂNG BÀI MỚI --- */
#newPostModal .modal-dialog {
  max-width: 640px;
}

#newPostModal input,
#newPostModal textarea,
#newPostModal select {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border-radius: 8px;
  border: 1px solid #e6e9ee;
}

#newPostModal textarea {
  min-height: 160px;
  resize: vertical;
}

#imagePreview {
  display: none;
  margin-top: 10px;
  margin-bottom: 10px;
  max-width: 100%;
  border-radius: 8px;
}

.row.right #createPost {
  margin-top: 0;
}

.row.right button {
  width: 100%;
  margin-top: 0;
}

.btn-choose-img {
  margin-top: 8px;
  margin-bottom: 8px;
  padding: 8px 12px;
  background-color: transparent;
  border-radius: var(--border-box--);
  border: var(--border-);
  text-align: center;
  cursor: pointer;
}

#createPost {
  width: 100%;
  height: 50px;
  margin-top: 1rem;
  border: var(--border-);
  border-radius: var(--border-box--);
  background-color: var(--primary);
  cursor: pointer;
}
/* =========================================
   7️⃣  FOOTER
========================================= */
.footer {
  padding: 20px;
  text-align: center;
  color: #6b7280;
  font-size: 14px;
}

/* =========================================
   8️⃣  RESPONSIVE DESIGN
========================================= */
@media (max-width: 1200px) {
  .layout {
    padding: 20px 100px;
  }
}

@media (max-width: 1170px) {
  .searchbar {
    width: 50% !important;
  }
  /* .searchbar #searchInput {
    width: 60% !important;
  } */
}

@media (max-width: 1110px) {
  .topbar .container {
    padding: 12px 50px;
  }
}

@media (max-width: 992px) {
  .layout {
    padding: 20px 50px;
  }

  .sidebar {
    width: 100%;
    margin-bottom: 20px;
  }

  .searchbar {
    width: 400px !important;
  }
}

@media (max-width: 768px) {
  .topbar .container {
    padding: 20px;
  }

  /* .container-highter {
    display: none !important;
  } */

  .container-768 {
    display: flex !important;
    padding: 12px 20px; /* 👈 giảm padding hai bên */
    gap: 8px;
  }

  .topbar .container .logo {
    font-size: 16px;
  }

  .topbar .searchbar {
    display: flex;
    justify-content: flex-end;
  }

  .topbar .searchbar #searchInput {
    position: absolute;
    top: -200%;
    right: 0;
    width: 100%;
  }

  .topbar .searchbar .img-search {
    display: block;
    width: 36px;
    height: 36px;
  }

  .actions .btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
  }

  .actions .btn span {
    display: none;
  }

  .actions .btn i {
    display: inline-block;
  }

  .actions #generalBtn {
    display: inline-block;
  }

  .actions .avatar {
    display: flex;
  }

  .layout {
    padding: 20px 20px;
    justify-content: center;
    flex-direction: column;
  }

  .sidebar {
    display: none;
  }

  .topbar .logo {
    flex: 9;
  }

  .topbar .searchbar {
    flex: 1;
  }
}
// Performance optimization implemented
// Database optimization completed
// Configuration settings optimized
// Security enhancements integrated
// Code documentation updated
/* Multi-line comment block
// Unit tests added for better coverage
/* Multi-line comment block
// Security enhancements integrated
// API improvements and error handling
// Bug fixes and code refactoring